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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
a friend who
Grammar usage guide and real-world examplesUSAGE SUMMARY
"a friend who" is correct and usable in written English.
You can use it whenever you wish to refer to a particular friend. For example, "My best friend is someone who is always there for me in times of need."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(4)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
Conversation with a friend who collects post-.
News & Media
Another had a friend who read palms.
News & Media
"From a friend who worked there.
News & Media
Hillary asked a friend who he was.
News & Media
"Igot this from a friend, who brought it from home.
"I had a friend, who died.
News & Media
A friend who will truly be missed.
News & Media
Mr. Rommeney ran into a friend who knew Mr. Lancaster.
News & Media
A friend calls a friend who knows a guy.
News & Media
Do you have a friend who weighs less than you?
News & Media
"I had a friend who lived in 626," he said.
News & Media
Expert writing Tips
Best practice
When describing a friend, use vivid details and specific examples to illustrate their personality and qualities. For instance, instead of saying "a friend who is kind", say "a friend who always brings soup when I'm sick".
Common error
Be specific when describing your friend's attributes. Avoid vague statements like "a friend who is nice". Instead, provide concrete examples of their behavior to make your writing more engaging and believable.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a friend who" functions as a relative clause, introducing additional information or description about a friend. This phrase is used to specify a particular quality, action, or characteristic of the friend. Ludwig AI confirms the correctness of its use.
Frequent in
News & Media
35%
Wiki
33%
Science
32%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "a friend who" is a grammatically correct and highly versatile phrase used to introduce a relative clause that describes a particular attribute or action of a friend. As Ludwig AI confirms, its usage is appropriate across a variety of contexts, though it frequently appears in news, wiki and scientific sources. When using this phrase, prioritize specificity and avoid overly broad statements to create more engaging writing. Remember that "a friend who" is generally preferred over "a friend that" when referring to people in formal writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
A close friend who
Adds the adjective "close" to emphasize the intimacy of the friendship.
A confidant who
Replaces "friend" with "confidant", emphasizing trust and shared secrets.
A companion who
Substitutes "friend" with "companion", suggesting a closer, more supportive relationship.
One of my friends who
Specifies that the friend is part of a larger group of friends.
A pal that
Uses a more informal term ("pal") for friend and replaces "who" with "that".
A buddy who
Uses a more casual term ("buddy") for friend.
A comrade who
Uses "comrade" suggesting a friend in a shared struggle or cause.
Someone I know who
Expands the phrase to include a broader category of acquaintances, not necessarily close friends.
An acquaintance who
Replaces "friend" with "acquaintance", indicating a less intimate relationship.
A fellow who is a friend
Rephrases to emphasize the person's status as a friend.
FAQs
How can I use "a friend who" in a sentence?
You can use "a friend who" to introduce a relative clause that describes a friend's characteristic or action. For example, "I need "a friend who" will tell me the truth, even when it's hard to hear."
What are some alternatives to "a friend who"?
Alternatives include "a pal that", "a companion who", or "someone I know who", depending on the context and the desired level of formality.
Is it grammatically correct to say "a friend that" instead of "a friend who"?
While "that" can sometimes replace "who" in relative clauses, it's generally preferred to use "who" when referring to people, especially in more formal writing. Therefore, "a friend who" is generally considered more appropriate.
What's the difference between "a friend who" and "my friend who"?
"A friend who" refers to any friend that meets the criteria you're describing, while "my friend who" refers to a specific friend of yours. The first is general, the second is specific.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested